STANDARDS AUSTRALIA/STANDARDS NEW …

1 ISBN 0 7337 9203 0 AS/NZS 3000 /Amdt 1/2009-07-30 STANDARDS AUSTRALIA/STANDARDS NEW zealand Amendment No. 1 to AS/NZS 3000 :2007 Electrical installations (known as the Australian/New zealand Wiring Rules) REVISED TEXT The 2007 edition of AS/NZS 3000 is amended as follows; the amendments should be inserted in the appropriate places. SUMMARY: This Amendment applies to the Preface, Contents, List of Tables, List of Figures, Clauses , , , , , , , , , , , , , , , , , , , , , , , , , 3, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Paragraphs A1, A2, , , , , B4, , , , , , , , , , , , , , , , and Appendix K, Tables , , , , , , B1, C1, C9, C10, C11, D2.

2 D13(a), H2 and Figures , , , , , , , , , , , , , , , , , , , , , B1, B4 and D1. Published on 30 July 2009. Approved for publication in New zealand on behalf of the STANDARDS Council of New zealand on 10 July 2009. Page 2 Preface Delete the first paragraph and replace with the following: This Standard was prepared by the Joint STANDARDS AUSTRALIA/STANDARDS New zealand Committee EL-001, Wiring Rules, to supersede, in australia /New zealand , AS/NZS 3000 :2000, Electrical installations (known as the Australian/New zealand Wiring Rules).

3 Page 5 Preface (xviii) Delete the text and replace with the following: (xviii) The location of underground cables must be marked at entry to or exit from a structure or recorded on a map. Page 5 Preface (xxiii) Delete the text and replace with the following: (xxiii) Illustrations of the multiple earthed neutral (MEN) system have been improved and clarification of the relationship of the MEN system to the IEC systems has been added. Page 6 Preface (xliii) Delete the text and replace with the following: (xliii) Verification of earth fault-loop impedance for socket-outlet circuits not protected by an RCD is now a mandatory test for both australia and New zealand .

4 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 Licensed to Mr Alex Frazer on 8 February 2010. Personal use licence only. Storage, distribution or use on network prohibited. Page 11 Contents Mark Appendix K as deleted . Page 14 List of Tables Mark Figures K1 and K2 as deleted . Page 16 List of Figures 1 For Figure , change the title to SINGLE-PHASE CABLES . 2 For Figure , change the title to MULTIPHASE CABLES . 3 Mark Figure K1 as deleted (page 18). Page 31 Clause Exception (v) In the first line, add the words or hinged after removable.

5 Page 33 Clause Insert the following as Item (c) and renumber Items (c) and (d) as (d) and (e): (c) The neutral bar or link in a switchboard without an MEN connection where the active supply to the switchboard has been isolated. Page 33 Clause Add at the end of the clause or to the earthing system of the source of supply. Page 46 Clause In the first line, replace the word protection with limitation . Page 52 Clause (g) Delete the words and in accordance with the product specification.

6 Page 53 Clause (b) 1 In the first line, replace the word enhanced with additional . 2 Alter present to presents in the 2nd line of the sentence. AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 Licensed to Mr Alex Frazer on 8 February 2010. Personal use licence only. Storage, distribution or use on network prohibited. Page 58 Clause Delete the text and replace with the following: Common neutral Each single-phase circuit, and each multiphase circuit that requires a neutral conductor for the operation of connected equipment, shall incorporate a neutral conductor.

7 A common neutral conductor may be used for two or more circuits subject to the following conditions: (a) The continuity of the common neutral conductor shall not depend on connections at the terminals of electrical equipment, including control switches. (b) Final subcircuits shall be controlled and protected by linked circuit-breakers or linked switches. (c) The neutral conductor shall be marked at switchboards to identify the associated active conductors in accordance with Clause (d) Alternative sources of supply to a single appliance (such as a water heater, space heater or air conditioner) shall have a common isolating switch.

8 NOTES: 1 Typical applications for common neutrals include groups of single-phase lights arranged across multiphase supply, and separate components of a single-phase appliance, such as a cooking unit 2 Looping of a common neutral conductor at terminals of equipment supplied from different circuits may cause the load side neutral conductor potential to rise to full line voltage and create a dangerous live situation when disconnected for repair or replacement of the equipment. 3 This Clause does not preclude connection of a common neutral in a junction box The current-carrying capacity of a common neutral shall be determined from the current-carrying capacity of the associated active conductors in accordance with Clause Page 59 Clause Delete the NOTE and replace with the following: NOTE: Guidance on the determination of maximum demand is provided for basic electrical installations in Appendix C.

9 Page 71 Clause Delete the last paragraph and replace with the following: A device located remotely from the electrical equipment it controls, which is used for shutting down for mechanical maintenance, shall be provided with facilities for securing it in the open position. Page 73 Clause (a) Replace the words Clauses , , or with the words Clause . AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 AMDT No. 1 JUL 2009 Licensed to Mr Alex Frazer on 8 February 2010. Personal use licence only.

10 Storage, distribution or use on network prohibited. Page 74 Clause In NOTE 2 replace Clause with Clause . Page 77 Clause In NOTE 3, replace Clause with Paragraph . Page 98 Clause Delete the entire clause and replace with the following: Arrangement Where additional protection of final subcircuits is required, in accordance with Clause , the final subcircuits shall be arranged as follows: (a) In all electrical installations where (i) the number of RCDs installed exceeds one.